Assurans (Sildenafil Citrate) — Patient Information (UK)

Assurans contains sildenafil citrate, a medicine used to treat certain sexual health conditions in adult men. This page explains how it works, how to take it, what to expect, and important safety information. Always read the patient information leaflet provided with your medicine and follow the advice of your healthcare professional.

Quick overview

• Active ingredient: Sildenafil citrate
• What it’s used for: Erectile dysfunction (ED); sometimes used for pulmonary arterial hypertension (PAH) in specific circumstances
• How it works: Helps improve blood flow to the penis when sexually stimulated
• Typical onset: Often within 30–60 minutes
• Duration: Effects may last up to about 4 hours (varies by person)
• Key safety caution: Do not take with nitrates (e.g., glyceryl trinitrate) or “poppers”

Basic product information

How sildenafil works (mechanism of action)

Sildenafil belongs to a group of medicines called PDE5 inhibitors. During sexual arousal, the body releases signals that increase blood flow to the penis. One of the key chemical messengers involved is cGMP (cyclic guanosine monophosphate).

PDE5 is an enzyme that breaks down cGMP. Sildenafil works by blocking PDE5, which helps maintain higher cGMP levels. This supports relaxation of blood vessels in the penis and improves blood flow when you are sexually stimulated.

Important: Sildenafil does not automatically cause an erection. It helps you achieve an erection in response to sexual stimulation.

Pharmacokinetics (how the body handles it)

Understanding pharmacokinetics can help you plan timing and interpret how it may feel.

• Absorption: Sildenafil is absorbed after you take it by mouth. Peak blood levels are typically reached within about 1–2 hours (though this can vary).
• Onset: Many people notice effects within 30–60 minutes.
• Distribution: It spreads through the body, including tissues relevant to its action.
• Metabolism: It is mainly broken down in the liver by enzymes such as CYP3A4.
• Elimination: The medicine is cleared from the body over time, with a typical elimination half-life of roughly 3–5 hours (varies by person).
• Impact of liver/kidney problems: Reduced liver or kidney function can increase exposure, so lower starting doses are often recommended in clinical practice.

What Assurans is typically used for in the UK

Erectile dysfunction (ED)

Assurans is commonly used to treat erectile dysfunction, which is the difficulty getting or maintaining an erection suitable for sexual activity.

Pulmonary arterial hypertension (PAH) (special context)

Sildenafil is also used in other conditions, including pulmonary arterial hypertension (PAH) at different dosing schedules. If you are taking sildenafil for PAH, follow the specific regimen provided with your product and healthcare guidance.

Note: Product indications and strengths can differ, so confirm what your particular pack is intended for.

Typical dosing and how to take it

This section provides general information. Your prescriber or pharmacist may tailor dose based on your health, other medicines, and response.

Common starting approach for ED

• Typical starting dose: Often 50 mg taken as needed, adjusted based on effect and tolerability.
• Lower dose options: Some people may start at 25 mg, especially if older, have liver impairment, or are on interacting medicines.
• Higher dose options: Some may be adjusted up (for example to 100 mg) if the starting dose isn’t effective and it’s safe to do so.

Maximum frequency: Do not take more than once per day unless your healthcare professional specifically advises otherwise.

Timing for best results

• Take the tablet about 30–60 minutes before sexual activity.
• Allow time for it to work—trying too soon or too late can reduce effectiveness.
• If you have eaten a large or fatty meal, it may take longer to work (see “Food interactions” below).

How to swallow

Swallow the tablet with water. You can take it with or without food, but food can affect timing.

When to avoid or be extra cautious

Safety is important. Do not take sildenafil if you have been advised not to use it due to certain medicines or conditions.

• Nitrates: Do not use with medicines for chest pain/angina such as glyceryl trinitrate (GTN) or isosorbide preparations.
• Riociguat: Do not use with riociguat (for specific pulmonary hypertension conditions).
• “Poppers”: Avoid recreational inhaled nitrites (“poppers”), which can have similar nitrate effects.
• Severe heart conditions: If you’ve been told you should not have sexual activity or you have unstable cardiovascular disease, seek medical advice before using.
• Very low blood pressure or recent stroke/heart attack: Extra caution is needed.

If you are unsure, consult a pharmacist or healthcare professional.

Food interactions (including fatty meals)

Food can affect absorption and therefore how quickly sildenafil starts working.

• Large, fatty meals: May delay onset and reduce peak effect. You may need to take it earlier if you’ve eaten heavily.
• Light meals: Usually less likely to significantly delay effects.
• Alcohol and meals: Alcohol can worsen ED and increase side effects (see next section).

Practical tip: If you have a full meal, consider taking sildenafil closer to 60 minutes before sexual activity.

Alcohol and medicine interactions

Alcohol

Alcohol can reduce erectile function by affecting blood flow, nerve signals, and arousal. It may also increase risk of side effects such as dizziness or headache.

• Moderate alcohol: Many people still tolerate sildenafil, but performance and side effects may worsen.
• Heavy drinking: More likely to make ED worse and increase the chance of unpleasant symptoms.
• Advice: If you drink, keep it moderate and avoid binge drinking on the day.

Important medicine interactions

Sildenafil is metabolised by CYP3A4. Medicines that strongly affect this enzyme can change sildenafil levels in the body.

• Nitrates (absolute contraindication): marked fall in blood pressure can occur.
• Guanylate cyclase stimulators (e.g., riociguat): risk of significant blood pressure lowering.
• Alpha-blockers (used for prostate symptoms or high blood pressure): may cause low blood pressure in some people—dosing and timing may need careful adjustment.
• Strong CYP3A4 inhibitors (may increase sildenafil levels):
  • Some HIV medicines
  • Some antifungals (e.g., ketoconazole)
  • Macrolide antibiotics (e.g., clarithromycin)
  Your dose may need to be lower and/or you may need more monitoring.
• Other ED medicines: avoid combining sildenafil with other PDE5 inhibitors unless a clinician specifically advises it.
• Antihypertensives (blood pressure medicines): the combination can sometimes lower blood pressure further, especially if you already have low readings.

Always tell your pharmacist about all medicines you take, including prescription, over-the-counter products, and supplements.

Indications and what you can realistically expect

Sildenafil is indicated for:

• Improving erections in men with erectile dysfunction
• Improving certain symptoms in other conditions such as PAH (under specific dosing regimens)

What it feels like / expectations:

• Some people notice improved firmness or better ability to maintain an erection.
• Effectiveness varies depending on the cause of ED (e.g., vascular issues, stress, diabetes, medications).
• If it doesn’t work, it may be due to timing, dose, interactions, or the underlying cause—adjustments may help.

Safety profile and common side effects

Common side effects

Side effects can occur as sildenafil affects blood vessels and related pathways. Many are mild and improve as the medicine wears off.

• Headache
• Flushing (warmth/redness)
• Indigestion or heartburn
• Blocked or runny nose
• Dizziness
• Blurred vision or changes in colour vision (e.g., a bluish tint)

Less common but serious warnings

• Priapism: A painful erection lasting longer than 4 hours requires urgent medical attention.
• Sudden vision changes: Rare reports of vision problems require urgent assessment.
• Severe dizziness/fainting: Could indicate low blood pressure, especially with interacting medicines or alcohol.
• Allergic reactions: Seek help if you develop swelling of the face/lips, difficulty breathing, or severe rash.
• Chest pain or serious cardiovascular symptoms: Seek immediate medical care.

Emergency help: If you experience severe symptoms such as fainting, chest pain, or an erection lasting more than 4 hours, get urgent medical assistance.

Practical tips for successful and comfortable use

• Start low and adjust: If side effects occur, lower dose may be better; if it doesn’t work, dose or timing may need adjustment (speak to a healthcare professional).
• Give it the right timing: Aim for 30–60 minutes before sex; consider 60 minutes if you had a heavy meal.
• Keep sexual stimulation in mind: Sildenafil supports the response, but you still need arousal.
• Avoid “stacking”: Don’t take extra doses to “make up” for timing or missed effect.
• Review interactions: If you take blood pressure medicines, alpha-blockers, or strong CYP3A4 inhibitors, check with a professional.
• Stay hydrated and pace alcohol: Drink water and avoid heavy drinking on the same day.
• Plan for first use: Try on a day when you don’t need to travel immediately afterward, as dizziness can occasionally occur.

Alternative options for erectile dysfunction

ED has many possible causes, and there are several treatment options in the UK. Alternatives include:

Other medicines

• Tadalafil (another PDE5 inhibitor): often taken at different dosing schedules; may suit those who prefer longer duration.
• Vardenafil (PDE5 inhibitor): similar class, different timing/dose characteristics.
• Apomorphine (where appropriate): sometimes used for selected cases.

Non-medicine approaches

• Lifestyle adjustments: Reducing smoking, moderating alcohol, regular exercise, and weight management can improve erectile health.
• Psychological support: Stress, anxiety, and relationship concerns can contribute to ED; counselling or sexual therapy may help.
• Managing underlying conditions: Diabetes, high blood pressure, high cholesterol, and sleep issues often need coordinated care.

Device and procedural options

• Vacuum erection devices
• Penile injections or intraurethral therapy (clinically supervised)
• Penile implants (specialist options)

Your best choice depends on your medical history, medication interactions, and preferences regarding onset and duration.

UK market and legal context (overview)

In the United Kingdom, medicines containing sildenafil may be supplied under different licensing and legal frameworks depending on the product strength and intended use. ED medicines are widely available, but safety checks and patient suitability screening are important because sildenafil has clinically significant interactions, particularly with nitrates and some heart-related treatments.

When purchasing online, reputable pharmacies typically require information about:

• Relevant medical history (e.g., heart disease, low blood pressure)
• Current medicines (especially nitrates, riociguat, and alpha-blockers)
• Age and suitability
• Any previous adverse reactions

Always choose an authorised online pharmacy and keep to the instructions provided with your product. Regulations and availability can change, so verify the details for your specific product and supplier.

Recent guidance and safety messaging (general)

While guidance can evolve, key UK-wide safety messages for PDE5 inhibitors like sildenafil typically include:

• Do not combine with nitrates or “poppers”.
• Seek urgent help for priapism (erection lasting >4 hours) or sudden vision changes.
• Be careful with alpha-blockers and antihypertensives to reduce risk of dizziness/fainting.
• Inform the pharmacy about all medicines and health conditions.

If you’re unsure whether sildenafil is safe for you, speaking with a healthcare professional or pharmacist is strongly recommended.

Delivery and availability in the UK

Assurans (sildenafil citrate) may be available from online pharmacies in the UK, subject to stock, strength, and compliance checks. Delivery terms vary by supplier.

• Availability: Stocks can fluctuate; some strengths may be more readily available than others.
• Delivery: Delivery options (standard/express) and dispatch times vary—check the estimated delivery window at checkout.
• Packaging: Medicines are typically sent in secure, discreet packaging.
• Storage at home: Store at room temperature (unless your pack says otherwise) and keep away from children.

Tip: If you are planning to use the medicine soon, order early enough to allow for standard shipping times.

How to use sildenafil safely (step-by-step)

1. Check suitability: Ensure you are not taking nitrates or riociguat and that sexual activity is generally safe for you.
2. Review your current medicines: Especially alpha-blockers and medicines that affect CYP3A4.
3. Choose timing: Take about 30–60 minutes before sex; consider longer if you ate a heavy meal.
4. Use the lowest effective dose: Don’t exceed once daily unless a professional advises otherwise.
5. Stop and seek help if needed: For fainting, severe chest pain, priapism >4 hours, or sudden vision changes.

FAQ — Assurans (sildenafil citrate)

1) How quickly does Assurans work?

Many people notice effects within 30–60 minutes. Peak levels are often reached about 1–2 hours after taking it.

2) How long does it last?

Effects often last for up to around 4 hours, though this varies by individual and dose.

3) Can I take it every day?

For erectile dysfunction, sildenafil is typically taken as needed. Follow the dosing advice for your specific product. In many cases, it should not be taken more than once within 24 hours.

4) Can I take it with food?

Yes. However, large or fatty meals can delay how fast it works. If you’ve eaten heavily, taking it earlier (closer to 60 minutes) may help.

5) Is it safe with alcohol?

Moderate alcohol may be tolerated by some people, but alcohol can worsen ED and increase side effects like dizziness or headache. Avoid heavy drinking.

6) Why doesn’t it work for me?

Common reasons include incorrect timing, dose that’s too low, heavy meals, or medicine interactions. It may also relate to the underlying cause of ED (e.g., diabetes, vascular disease, stress). If it’s not working, discuss options with a healthcare professional.

7) What should I do if I get side effects?

Mild side effects often settle as the medicine wears off. If you experience severe dizziness, fainting, chest pain, an allergic reaction, or priapism (erection >4 hours), seek urgent medical help.

8) Can I take it with nitrates?

No. Sildenafil must not be used with nitrates (for angina/chest pain) because it can cause dangerous drops in blood pressure.

9) Can I combine sildenafil with other ED tablets?

Do not combine PDE5 inhibitors (for example, sildenafil with tadalafil or vardenafil) unless advised by a healthcare professional.

10) Who should be extra careful?

Extra caution is needed if you take alpha-blockers, have a history of heart disease, low blood pressure, significant liver impairment, or take medicines that interact with sildenafil. Always check with a pharmacist if you’re unsure.

Important final note

Sildenafil can be very effective for many men with erectile dysfunction, but it isn’t suitable for everyone. If you have any concerns about interactions—especially with nitrate medicines—or if you’re experiencing symptoms that may indicate a serious cardiovascular issue, seek professional advice promptly.